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Tag

API

28 projects tagged API, best ranked first. Some replace a paid product; others are free tools people use alongside one.

Ollama

ollama/ollama Healthy growth: Stars rising (+3,337 in 30 days) with 100+ people committing, active 11 of the last 12 weeks.
★ 184k active today

Local model runner that downloads and serves open LLMs (Gemma, Qwen, DeepSeek, gpt-oss and more) with a CLI and local API.

Runs locally
Confirmed: Yes
Commercial use
Confirmed: Yes · MIT
Paid services
Partial: Optional only
Hardware
Partial: CPU works
Setup
Confirmed: Easy
8 of 8 facts sourced · checked 6d ago GitHub ↗ View details

Jan

janhq/jan Actively maintained: 100+ people committing, active 12 of the last 12 weeks.
★ 45k active 1d ago

Desktop app that downloads and runs LLMs from Hugging Face offline, with optional cloud model connections and a local OpenAI-compatible API.

Runs locally
Confirmed: Yes
Commercial use
Confirmed: Yes · Apache-2.0
Paid services
Confirmed: None required
Hardware
Confirmed: CPU works
Setup
Confirmed: Easy
8 of 8 facts sourced · checked 6d ago GitHub ↗ View details

FreeLLMAPI

tashfeenahmed/freellmapi Actively maintained: 100+ people committing, active 12 of the last 12 weeks.
★ 38k active today

Self-hosted router that pools free-tier LLM provider keys behind one OpenAI-compatible API, for developers and coding agents.

Runs locally
Confirmed: Yes
Commercial use
Confirmed: Yes · MIT
Paid services
Partial: Optional only
Hardware
Confirmed: CPU works
Setup
Confirmed: Easy
8 of 8 facts sourced · checked 3d ago GitHub ↗ View details

Firecrawl (self-hosted)

firecrawl/firecrawl Actively maintained: 100+ people committing, active 12 of the last 12 weeks.
★ 194k active today

Open-source version of the Firecrawl API that crawls, maps, searches and scrapes websites into Markdown or JSON, self-hosted with Docker Compose.

Runs locally
Confirmed: Yes
Commercial use
Partial: Conditions · AGPL-3.0
Paid services
Confirmed: None required
Hardware
Unknown: Unknown
Setup
Confirmed: Medium
6 of 8 facts sourced · checked 5d ago GitHub ↗ View details

DocuSeal

docusealco/docuseal Actively maintained: 3 people committing, active 12 of the last 12 weeks.
★ 19k active 2d ago

Self-hostable app to build PDF forms and have them filled and signed by multiple people, with email, API and webhooks; some features are paid Pro.

Runs locally
Confirmed: Yes
Commercial use
Partial: Conditions · AGPL-3.0-only
Paid services
Partial: Optional only
Hardware
Confirmed: See details
Setup
Confirmed: Medium
8 of 8 facts sourced · checked today GitHub ↗ View details

Documenso

documenso/documenso Actively maintained: 100+ people committing, active 12 of the last 12 weeks.
★ 15k active today

Self-hostable document signing platform with signing order, reminders, templates, audit logs and an API; AGPL core plus paid Enterprise features.

Runs locally
Confirmed: Yes
Commercial use
Partial: Conditions · AGPL-3.0-only
Paid services
Partial: Optional only
Hardware
Confirmed: CPU works
Setup
Confirmed: Medium
8 of 8 facts sourced · checked 6d ago GitHub ↗ View details

Cal.diy

calcom/cal.diy Healthy growth: Stars rising (+662 in 30 days) with 100+ people committing, active 6 of the last 12 weeks.
★ 49k active 1d ago

MIT-licensed community edition of Cal.com for self-hosted booking pages, with team, workflow and other enterprise features removed.

Runs locally
Confirmed: Yes
Commercial use
Partial: Conditions · MIT
Paid services
Confirmed: None required
Hardware
Unknown: Unknown
Setup
Confirmed: Medium
7 of 8 facts sourced · checked 6d ago GitHub ↗ View details

Formbricks

formbricks/formbricks Healthy growth: Stars rising (+142 in 30 days) with 100+ people committing, active 12 of the last 12 weeks.
★ 13k active today

Self-hostable survey platform for link, website, in-app and email surveys with logic, webhooks and integrations; some team features are Enterprise.

Runs locally
Confirmed: Yes
Commercial use
Partial: Conditions · AGPL-3.0-only
Paid services
Partial: Optional only
Hardware
Confirmed: CPU works
Setup
Confirmed: Medium
8 of 8 facts sourced · checked 5d ago GitHub ↗ View details

ACE-Step 1.5

ace-step/ACE-Step-1.5
★ 14k active 10d ago

Open-weight music model that writes and renders full songs with vocals locally, with covers, repainting, stem extraction and LoRA training.

Runs locally
Confirmed: Yes
Commercial use
Confirmed: Yes · MIT
Paid services
Confirmed: None required
Hardware
Confirmed: GPU, ~4GB+
Setup
Confirmed: Easy
8 of 8 facts sourced · checked 6d ago GitHub ↗ View details

Kaneo

usekaneo/kaneo Actively maintained: 100+ people committing, active 12 of the last 12 weeks.
★ 9.5k active today

Lightweight project management with board, list, calendar and Gantt views, backlog, time tracking and GitHub/Gitea links; MIT licensed.

Runs locally
Confirmed: Yes
Commercial use
Confirmed: Yes · MIT
Paid services
Partial: Optional only
Hardware
Confirmed: CPU works
Setup
Confirmed: Medium
8 of 8 facts sourced · checked 5d ago GitHub ↗ View details

XERJ

xerj-org/xerj Healthy growth: Stars rising (+11,620 in 30 days) with 54 people committing, active 12 of the last 12 weeks.
★ 12k active today

Local search engine with an Elasticsearch-compatible API and MCP server that indexes folders so coding agents can query code instead of reading files.

Runs locally
Confirmed: Yes
Commercial use
Confirmed: Yes · Apache-2.0
Paid services
Confirmed: None required
Hardware
Unknown: Unknown
Setup
Confirmed: Easy
7 of 8 facts sourced · checked 3d ago GitHub ↗ View details

Bigcapital

bigcapitalhq/bigcapital Actively maintained: 28 people committing, active 12 of the last 12 weeks.
★ 3.9k active today

Double-entry accounting and inventory app with invoices, estimates, Stripe payment links, expenses, Plaid bank sync and financial reports.

Runs locally
Confirmed: Yes
Commercial use
Partial: Conditions · AGPL-3.0-only
Paid services
Partial: Optional only
Hardware
Confirmed: CPU works
Setup
Confirmed: Medium
8 of 8 facts sourced · checked 5d ago GitHub ↗ View details

LimeSurvey

LimeSurvey/LimeSurvey Healthy growth: Stars rising (+42 in 30 days) with 100+ people committing, active 12 of the last 12 weeks.
★ 3.8k active today

Long-running PHP survey platform with 30+ question types, branching, 80+ languages, statistics and a RemoteControl API. GPL-2.0-or-later.

Runs locally
Confirmed: Yes
Commercial use
Partial: Conditions · GPL-2.0-or-later
Paid services
Confirmed: None required
Hardware
Confirmed: CPU works
Setup
Confirmed: Medium
8 of 8 facts sourced · checked 5d ago GitHub ↗ View details

OpenSign

OpenSignLabs/OpenSign
★ 7.1k active 2d ago

Self-hostable PDF e-signing with multiple signers in sequence, OTP checks, templates, audit trail with completion certificate, and an API.

Runs locally
Confirmed: Yes
Commercial use
Partial: Conditions · Custom licence
Paid services
Confirmed: None required
Hardware
Unknown: Unknown
Setup
Confirmed: Medium
7 of 8 facts sourced · checked 6d ago GitHub ↗ View details

Plunk

useplunk/plunk Actively maintained: 42 people committing, active 12 of the last 12 weeks.
★ 5.5k active today

Open-source email platform for transactional mail, campaigns and workflow automations with segments and open/click analytics; sends via AWS SES.

Runs locally
Confirmed: Yes
Commercial use
Partial: Conditions · AGPL-3.0-only
Paid services
No: Required
Hardware
Unknown: Unknown
Setup
Confirmed: Medium
7 of 8 facts sourced · checked 5d ago GitHub ↗ View details

Kimai

kimai/kimai Healthy growth: Stars rising (+57 in 30 days) with 100+ people committing, active 11 of the last 12 weeks.
★ 5.1k active 1d ago

Self-hosted time tracker for freelancers and teams that turns billable timesheets into invoices; rates per customer, project or user.

Runs locally
Confirmed: Yes
Commercial use
Partial: Conditions · AGPL-3.0-only
Paid services
Partial: Optional only
Hardware
Unknown: Unknown
Setup
Confirmed: Medium
7 of 8 facts sourced · checked 5d ago GitHub ↗ View details

useSend

usesend/useSend
★ 4.7k active 2d ago

Open-source sending platform on top of Amazon SES with transactional API, SMTP, contacts and marketing emails; formerly Unsend; still in beta.

Runs locally
Confirmed: Yes
Commercial use
Partial: Conditions · AGPL-3.0-only
Paid services
No: Required
Hardware
Unknown: Unknown
Setup
Confirmed: Medium
7 of 8 facts sourced · checked 5d ago GitHub ↗ View details

Easy!Appointments

alextselegidis/easyappointments Healthy growth: Stars rising (+64 in 30 days) with 100+ people committing, active 12 of the last 12 weeks.
★ 4.5k active 2d ago

Self-hosted PHP booking app where customers book services with providers, with Google Calendar and CalDAV sync and email notifications.

Runs locally
Confirmed: Yes
Commercial use
Partial: Conditions · GPL-3.0
Paid services
Confirmed: None required
Hardware
Unknown: Unknown
Setup
Confirmed: Medium
7 of 8 facts sourced · checked 6d ago GitHub ↗ View details

sandboxd

tastyeffectco/sandboxd Actively maintained: 12 people committing, active 8 of the last 12 weeks.
★ 970 active 1d ago

Self-hosted engine and web console where a coding agent builds apps from a prompt in isolated Docker sandboxes on your own server, each with a preview URL.

Runs locally
Confirmed: Yes
Commercial use
Confirmed: Yes · MIT
Paid services
Confirmed: None required
Hardware
Confirmed: CPU works
Setup
Confirmed: Medium
8 of 8 facts sourced · checked 6d ago GitHub ↗ View details

Form.io

formio/formio
★ 2.3k active 2d ago

Developer form and API platform; drag-and-drop builder whose forms become REST APIs, embedded in Angular or React apps. PDF and reporting are paid.

Runs locally
Confirmed: Yes
Commercial use
Partial: Conditions · OSL-3.0
Paid services
Partial: Optional only
Hardware
Unknown: Unknown
Setup
Confirmed: Medium
7 of 8 facts sourced · checked 5d ago GitHub ↗ View details

Keila

pentacent/keila
★ 2.2k active today

Open-source newsletter tool with a WYSIWYG, Markdown or MJML editor, sign-up forms, segments and analytics; Docker self-host or Keila Cloud.

Runs locally
Confirmed: Yes
Commercial use
Partial: Conditions · AGPL-3.0-or-later
Paid services
Partial: Optional only
Hardware
Unknown: Unknown
Setup
Confirmed: Medium
7 of 8 facts sourced · checked 5d ago GitHub ↗ View details

BillionMail

Billionmail/BillionMail Quiet lately: No commits in the last 12 weeks.
★ 16k active 4mo ago

Self-hosted mail server plus email marketing from the aaPanel team; contacts, tags, templates, campaigns and open/click stats, sending from your own server.

Runs locally
Confirmed: Yes
Commercial use
Partial: Conditions · AGPL-3.0-only
Paid services
Confirmed: None required
Hardware
Confirmed: CPU works
Setup
Confirmed: Medium
8 of 8 facts sourced · checked 5d ago GitHub ↗ View details

AI shorts generator (short-video-maker)

mushigaite/short-video-maker Few active maintainers: Only 1 person committed in the last 12 months, so its future depends on very few hands.
★ 631 active 3d ago

Python CLI and local web UI that turns a YouTube link or video file into ranked, vertical short clips with an LLM picking the highlights.

Runs locally
Confirmed: Yes
Commercial use
Confirmed: Yes · MIT
Paid services
Partial: Optional only
Hardware
Confirmed: CPU works
Setup
Confirmed: Easy
8 of 8 facts sourced · checked 3d ago GitHub ↗ View details

acestep.cpp

ServeurpersoCom/acestep.cpp Actively maintained: 13 people committing, active 8 of the last 12 weeks.
★ 440 active 5d ago

C++/GGML port of ACE-Step 1.5 with a local web UI and API; runs quantised song models on CPU, CUDA, Metal or Vulkan without Python.

Runs locally
Confirmed: Yes
Commercial use
Confirmed: Yes · MIT
Paid services
Confirmed: None required
Hardware
Partial: CPU works
Setup
Confirmed: Hard
8 of 8 facts sourced · checked 6d ago GitHub ↗ View details

SolidInvoice

SolidInvoice/SolidInvoice Healthy growth: Stars rising (+9 in 30 days) with 14 people committing, active 11 of the last 12 weeks.
★ 979 active today

MIT-licensed quotes, invoices, recurring billing and online payments via Stripe, PayPal and other gateways; Docker, single binary or hosted.

Runs locally
Confirmed: Yes
Commercial use
Confirmed: Yes · MIT
Paid services
Confirmed: None required
Hardware
Unknown: Unknown
Setup
Confirmed: Easy
7 of 8 facts sourced · checked 5d ago GitHub ↗ View details

LibreSign

LibreSign/libresign Healthy growth: Stars rising (+11 in 30 days) with 45 people committing, active 12 of the last 12 weeks.
★ 834 active today

Nextcloud app for document signing workflows with signing order, internal and external signers, reminders, certificates and validation.

Runs locally
Confirmed: Yes
Commercial use
Partial: Conditions · AGPL-3.0-or-later
Paid services
Confirmed: None required
Hardware
Unknown: Unknown
Setup
Confirmed: Medium
7 of 8 facts sourced · checked 6d ago GitHub ↗ View details

RankMeFast

SelmiAbderrahim/rankme.fast Few active maintainers: Only 1 person committed in the last 12 months, so its future depends on very few hands.
★ 759 active 12d ago

Self-hosted SEO platform for site audits, rank tracking, keyword research, backlinks and AI visibility, using your own data-vendor keys.

Runs locally
Confirmed: Yes
Commercial use
Partial: Conditions · AGPL-3.0-only
Paid services
No: Required
Hardware
Unknown: Unknown
Setup
Confirmed: Medium
7 of 8 facts sourced · checked 3d ago GitHub ↗ View details

DottedSign Self-Hosted

DottedSign-Official/dottedsign-self-hosted Few active maintainers: Only 2 people committed in the last 12 months, so its future depends on very few hands.
★ 54 active 4w ago

New AGPL self-hosted edition of the commercial DottedSign e-signature service, run with Docker Compose; signed files carry a free-tier code.

Runs locally
Confirmed: Yes
Commercial use
Partial: Conditions · AGPL-3.0-only
Paid services
Partial: Optional only
Hardware
Confirmed: CPU works
Setup
Confirmed: Medium
8 of 8 facts sourced · checked 6d ago GitHub ↗ View details

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